Definition of tunica in English:


Line breaks: tu¦nica
Pronunciation: /ˈtjuːnɪkə

noun (plural tunicae /-kiː/)

  • 1 Anatomy A membranous sheath enveloping or lining an organ: [with Latin modifier]: tunica media
    More example sentences
    • Arterial calcification most commonly involves the tunica media.
    • Muscle fibers arranged in various striae form the tunica media of veins, for example, in medium-sized vessels.
    • The tumor completely encased the right coronary artery with external compression of the vessel wall without invasion into the tunica media.
  • 2 Botany The outer layer or layers of cells in an apical meristem, which contribute to surface growth.


late 17th century: from Latin, literally 'tunic'.

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